ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Hongyan Chen,Xing Chang,Daming Chen,Jinbao Liu,Ping Liu,Yuan Xue,Hualin Lin,Sheng Han
A hierarchically flower-like structure with nanoarrays coupled with 3D macroporous sponge graphene combines the preponderances of the hierarchical nanoarchitecture and composition to enhance electrochemical performance. A graphene-karst cave flower-like Ni-Mn layered double oxides (GL) electrode material was prepared through a mild hydrothermal-carbonization process. As an electrode material, the resulting GL composite exhibited excellent performance with high specific capacitance (1,648 and 1,252 F g −1 at 0.5 and 10 A g −1 , respectively) and good cycling stability (almost 96% retention after 6,000 charge-discharge cycles) for energy storage electrode. The GL composite material acting as a positive electrode for the asymmetric supercapacitor also exhibited high specific capacitance of 116.56 F g −1 at 0.5 A g −1 and excellent cycling stability with 86.7% capacitance retention after 6,000 cycles at a current density of 5 A g −1 . This outstanding electrochemical performance may be attributed to the synergistic effect of the layered double oxides and 3D macroporous graphene oxide sponge.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2016
·
IF 3.611
Panpan Yang,Qineng Xia,Xiaohui Liu,Yanqin Wang
Catalytic transfer hydrogenation/hydrogenolysis of 5-hydroxymethylfurfural (HMF) to valuable chemicals, 2,5-dimethylfuran (DMF), is realized over a carbon supported nickel-cobalt catalyst with formic acid as hydrogen donor. The highest DMF yield, 90.0%, is achieved at 210 °C under self-generated pressure. A reaction route involving 5-methylfurfural (5-MF) instead of 2,5-bis(hydromethyl)furan (BHMF) as an intermediate has been investigated, which is different from that when H 2 is used as hydrogen source in previous reports. The influence of the amount of formic acid is investigated on the conversion of HMF and the yield of DMF. The effectiveness of this strategy has also been used for the conversion of furfural to 2-methylfuran, another valuable chemicals.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Jia Liu,Jinshuo Qiao,Hong Yuan,Jie Feng,Chao Sui,Zhenhua Wang,Wang Sun,Kening Sun
Ni modified Ce 0.6 Mn 0.3 Fe 0.1 O 2 (Ni-CMF) material is evaluated as an anode material for hybrid direct carbon fuel cell (HDCFC). The Temperature Programmed Reaction (TPR) and GC test results show that the Ni additive significantly promotes the oxidation of carbon and consequently accelerates the formation rate of CO. Moreover, the Ni-CMF material is found to show a high electrical conductivity compared to pure CMF in HDCFC operating conditions. Taking advantage of the excellent catalytic activity and high conductivity, the electrolyte-supported HDCFC with Ni-CMF anode shows a high maximum power density of 580.7 mW cm −2 at 800 °C, when activated carbon is used as the fuel. Furthermore, the cell displays good stability under galvanostatic operation at current density of 50 mA cm −2 at 750 °C. These results indicate that the designed Ni-CMF composite material has the potential to be developed as an alternative anode for HDCFCs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jing Wang,Shanjun Mao,Zeyan Liu,Zhongzhe Wei,Haiyan Wang,Yiqing Chen,Yong Wang
The research of a robust catalytic system based on single NiOx electrocatalyst for hydrogen evolution reaction (HER) remains a huge challenge. Particularly, the factors that dominate the catalytic properties of NiOx-based hybrids for HER have not been clearly demonstrated. Herein, a convenient protocol for the fabrication of NiOx@bamboo-like carbon nanotube hybrids (NiOx@BCNTs) is designed. The hybrids exhibit superb catalytic ability and considerable durability in alkaline solution. A benchmark HER current density of 10 mA cm–2 has been achieved at an overpotential of ∼79 mV. In combination with the experimental results and density functional theory (DFT) calculations, this for the first time definitely validates that the inherent high Ni0 ratio and the Ni0 on the interface of Ni/NiO play a vital role in the outstanding catalytic performance. Especially, the Ni0 on the interface of Ni/NiO performs superior activity for water splitting compared with that of bulk Ni0. These conclusions provide guidance for the rational design of the future non-noble metallic catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2016
·
IF 1.112
Lei Shi,Liping Hu,Jing Zheng,Min Zhang,Jingli Xu
A specific metal organic framework (MOF) material was synthesized based on Ni(Ac)2 · 4H2O and 1-H-benzimidazole-5-carboxylic acid through hydrothermal method. It was a promising candidate as adsorbent due to its large surface areas, porous structure, ordering and controllable properties. In this paper, it was characterized by XRD, SEM, FTIR, TGA and N2 adsorption isotherm. Meanwhile MOF was treated as adsorbent for absorption of methylene blue. Using this material to remove methylene blue, which is low cost, simple and high efficiency. It shows great potential in removing other dyes and the adsorption rate could reach 85.08%.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Niu Tong,Shi Zhengyang,Sun Jinchang,Zhang Qianwen
The modification of petroleum resin (PR) by catalytic hydrogenation is an upgrading technology for producing high-value-added hydrogenated petroleum resin (HPR) from of pyrolysis petroleum by-product. This research employed alumina supports with different pore size distributions to prepare supported Mo-Ni type catalysts and investigated their catalytic hydrogenation performance on C 9 petroleum resin. Catalysts prepared with bimodal pore alumina (BPA) supports effectively overcome the limitations of internal diffusion and increase the quantity of active sites, thus increasing the catalytic activity for hydrogenation. The experimental results demonstrated that MoNi/BPA achieved a hydrogenation degree of 99.94% for HC 9 PR, with the hydrogenated product having a Pt–Co colour of 2.37 Hazen. After 140 h of reaction, the hydrogenation degree of HC 9 PR remained at 96.51%, and the Pt–Co colour value was lower than 40 Hazen. This investigation confirms that solving the mass transfer issues of petroleum resin molecules in the pores of supported catalysts is key to designing efficient hydrogenation catalysts for petroleum resin. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhao-Xing Yan,Ling-Xi Zhao,Ning Liu,Na Li,Ru-Song Zhao
Non-steroidal anti-inflammatory drugs (NSAIDs) have gained significant attention as emerging pollutants and are increasingly detected in aquatic environments. Therefore, it is imperative to investigate the efficient removal of NSAIDs from water systems. In this study, a magnetic LDH with three-dimensional hollow structure (Fe 3 O 4 @ZIF-67@Co-Ni LDH) was synthesized using ZIF-67 as a template for the removal of carprofen (CPF) and flurbiprofen (FLU) from water environments. The adsorption process of CPF and FLU on Fe 3 O 4 @ZIF-67@Co-Ni LDH and the competitive adsorption between these two NSAIDs were investigated. The adsorption mechanism was explored by experimental analysis and theoretical calculation. Results demonstrated that the pseudo-second-order kinetic model and Liu isotherm model can better fit the kinetic and isotherm data, and according to the thermodynamic data analysis, the adsorption process was exothermic, spontaneous and stable. The adsorption capacity of CPF and FLU on Fe 3 O 4 @ZIF-67@Co-Ni LDH can reach 856.2 mg/g and 797.5 mg/g. Fe 3 O 4 @ZIF-67@Co-Ni LDH exhibited high adsorption capacity for CPF and FLU in actual environment water, with stronger affinity towards CPF when both NSAIDs coexisted simultaneously. The three-dimensional hollow structure enhanced the adsorption capacity of Fe 3 O 4 @ZIF-67@Co-Ni LDH, making it a promising adsorbent for NSAIDs.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Haocheng Ji,Junxiong Wang,Haotian Qu,Junfeng Li,Wenhai Ji,Xiao Qiu,Yanfei Zhu,Hengyu Ren,Ruyu Shi,Guanjun Ji,Wenguang Zhao,Guangmin Zhou
Facing the resource and environmental pressures brought by the retiring wave of lithium-ion batteries (LIBs), direct recycling methods are considered to be the next generation's solution. However, the contradiction between limited battery life and the demand for rapidly iterating technology forces the direct recovery paradigm to shift toward “direct upcycling.” Herein, a closed-loop direct upcycling strategy that converts waste current collector debris into dopants is proposed, and a highly inclusive eutectic molten salt system is utilized to repair structural defects in degraded polycrystalline LiNi 0.83 Co 0.12 Mn 0.05 O 2 cathodes while achieving single-crystallization transformation and introducing Al/Cu dual-doping. Upcycled materials can effectively overcome the two key challenges at high voltages: strain accumulation and lattice oxygen evolution. It exhibits comprehensive electrochemical performance far superior to commercial materials at 4.6 V, especially its fast charging capability at 15 C, and an impressive 91.1% capacity retention after 200 cycles in a 1.2 Ah pouch cell. Importantly, this approach demonstrates broad applicability to various spent layered cathodes, particularly showcasing its value in the recycling of mixed spent cathodes. This work effectively bridges the gap between waste management and material performance enhancement, offering a sustainable path for the recycling of spent LIBs and the production of next-generation high-voltage cathodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-15
·
IF 5.3
Yin Hang,Bai Xiao,Zhang Fanjun,Yang Ziyin
Single atom catalysts (SACs) have attracted attention due to their excellent catalysis activity under specific reactions and conditions. However, the low density of SACs greatly limits catalytic performance. The three-dimensional graphene hollow nanospheres (GHSs) with very thin shell structure can be used as excellent carrier materials. Not only can its outer surface be used to anchor metal single atoms, but its inner surface can also provide rich sites. Here, a novel step-by-step assembly strategy is reported to anchor nickel single atoms (Ni SAs) on the inner and outer surfaces of GHSs (Ni SAs/GHSs/Ni SAs), which significantly increases the loading capacity of Ni SAs (4.8 wt%). Compared to conventional materials that only anchor Ni SAs to the outer surface of the carrier (Ni SAs/GHSs), Ni SAs/GHSs/Ni SAs exhibits significantly higher electrocatalytic activity toward glucose oxidation in alkaline media. The sensitivity of Ni SAs/GHSs/Ni SAs/GCE is nearly five times higher than that of Ni SAs/GHSs/GCE. Moreover, the sensor based on Ni SAs/GHSs/Ni SAs can detect glucose in a wide concentration range of 0.8 µM–1.1244 mM with a low detection limit of 0.19 µM (S/N = 3). This study not only provides an effective sensing material for glucose detection, but also opens a new avenue to construct high-density metal SACs. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2024
·
IF 6.1
Ying Liu,Sen Zhang,Yupeng Yao,Leilei Fan,Jian Wang,Yanxia Wu,Lin Jing,Peide Han,Caili Zhang
The ideal mechanical performances of in-situ synthesized graphene/Ni composite have not been obtained due to the weak interfacial bonding. To realize the high strengthening efficiency of graphene, this paper proposed a Mo microalloying strategy. The influences of Mo concentration on the microstructures, interfacial bonding characteristics, and quasi-static tensile behavior of the composite were investigated. The results showed an appropriate Mo concentration (0.2 wt%) not only enabled a strong interfacial bonding but also reduced the stacking fault energy of the Ni matrix, generating the twinning and further altering the strength and plasticity. The yield and tensile strength of the composite were increased by 215.3 % and 20.3 %, respectively, but no significant reduction in plasticity was observed. The strengthening of the composite was ascribed to the effective load transfer, twinning, and dislocation strengthening, whereas the critical role of large-area graphene nanosheets and deformation twinning in suppressing the crack propagation ensured a high toughness.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Quanqi Zhang,Zhonghua Jiang,Yimin Zhang,Xinyu Xu,Ye Yang,Yucai Qin,Lijuan Song,Yi Mei,Yun Zu
Carbon deposition, an inevitable product operated at high temperatures, is a headache-inducing obstacle to enhance catalyst stability for methane dry reforming (MDR). Herein, we have ingeniously designed sintering-resistant Ni@S-1 nanosheet zeolites to purposefully induce common linear and non-linear deactivation of catalysts during MDR reaction for deciphering carbon footprint. Multiple evidences unveiled that "transient carbon", composed of multi-phenyl-rings via rapidly rearrangement of CH x * fragments, was a crucial vane for catalyst deactivation. Accordingly, we proposed a dynamic equilibrium theory for the generation and elimination of "transient carbon". Achieving this balance was dependent of the matching degree between Ni 0 nanoparticles and NiO x (OH) y , which both separately originated from the evolutions of 1:1 and 2:1 Ni phyllosilicates controlled by nanosheet thickness. Delightfully, synthetic Ni@S-1–60nm catalyst with an optimal ratio of Ni 0 /NiO x (OH) y contributed higher MDR activity and durability. These findings derived a new MDR reaction pathway and afforded value-filled information for developing high carbon-resistant MDR catalysts.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Qi Shen,Yongwang Li,Fumin Wang,Xubin Zhang,Zhiwei Zhang,Zhengliang Zhang,Yinbo Yang,Changhao Bing,Xiaolu Fan,Jinjin Zhang,Xinyuan He
The development of green and low-cost catalysts to catalyze the conversion of biomass and its derivatives into relevant green organic chemicals and fuels is an important way to solve the energy crisis. In this work, a series of Ni/CoAlOx catalysts synthesized through calcination process with hydrotalcite as the precursor were evaluated for the selective production of 2-methylfuran (2-MF) or 1,5-pentanediol (1,5-PeD) from furfural (FFA). The Ni 0.2 /CoAlOx-500 exhibits the optimal activity by adjusting the Ni/(Co + Al) mass ratio and the direct reduction temperature. The mass concentration of FFA greatly influenced the product distribution, FFA preferred to produce 1,5-PeD at low concentration with a maximum selectivity of 42.8 %, and 2-MF at high concentration with a maximum selectivity of 82.6 %. DFT calculations reveal that the different substrate concentrations influence the adsorption pattern over the catalyst, with low substrate concentration tending to flat adsorption and high concentration tending to tilted adsorption. This study not only develops efficient catalysts for biomass conversion, but also reveals the mechanism of FFA directed to 2-MF and 1,5-PeD, which provides useful insights for directed conversion of biomass hydrogenation.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）